For the elementary reaction M → N, the rate of disappearance of M increases by a factor of 8 upon doubling the concentration of M. The order of the reaction with respect to M is

Engineering

Chemistry

Methods of Determination of Order of Reaction

Question

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rate of Reaction = K[M]^x

$\frac{r_{1}}{r_{2}} = \frac{K {[M]}^{x}}{K {[2 M]}^{x}}$

$\frac{1}{8} = \frac{1}{2^{x}}$

x = 3

Note : Here either this reaction is not elementary or if it is elementary then not balanced.